#salary薪资
a=2000
b=float(input('请输入销售额:'))
if b<=3000:
    print(f'薪水={a}元')
elif b>3000 and b<=7000:
    print(f'薪水={a+b*0.1}元')
elif b>7000 and b<=10000:
    print(f'薪水={a+b*0.15}元')
elif b>10000:
    print(f'薪水={a+b*0.2}元')